Glass plate cleaning device

Abstract

A glass plate cleaning device (1) is provided with: a rotary cleaning body (W) having a cleaning member (9) that comes into contact with the upper surface (Ga) of a glass plate (G), and a rotating shaft (8) that is connected to the cleaning member (9) and rotates together with the cleaning member (9); and a support base (5) that supports the rotating shaft (8). The support base (5) is provided with a sliding support structure (S) that supports the rotating shaft (8) so as to be movable in the axial direction.

Description

Technical Field

[0001] The utility model relates to a cleaning device for a glass plate. Background Art

[0002] Displays such as liquid crystal displays and organic EL displays are becoming increasingly high-definition. In line with this, fine circuits are formed on the main surface of a glass plate used as a substrate for the display during the manufacturing process of the display. Therefore, such glass plates are required to have high cleanliness without the adhesion of dust and dirt.

[0003] Therefore, in the manufacturing process of a glass plate, a cleaning step of cleaning the main surface of the glass plate is generally provided after the cutting step of cutting the original glass plate into a predetermined size to obtain a plurality of glass plates.

[0004] As a method for cleaning the main surface of a glass plate, for example, the method disclosed in Patent Document 1 can be cited. In this document, each cleaning member is rotated while a plurality of cleaning members are in contact with the main surface of the glass plate. Thus, the main surface of the glass plate is cleaned while being wiped. It should be noted that the cleaning member is mounted on the front end of a rotating shaft (main shaft). By driving the rotating shaft in rotation, the cleaning member rotates together with the rotating shaft.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2020-7193 Utility Model Content

[0008] Issues to be solved by utility models

[0009] Patent Document 1 discloses that a spacer is provided between a cleaning member and a rotating shaft in order to adjust the height position of the cleaning member relative to the glass plate. The height position of the cleaning member relative to the glass plate is adjusted by adjusting the thickness of the spacer.

[0010] However, even if a spacer is provided, the height position of the cleaning member relative to the glass plate may not be accurately adjusted due to variations in the thickness of the spacer, etc. As a result, the contact between the cleaning member and the glass plate becomes insufficient, which may cause uneven cleaning on the main surface of the glass plate.

[0011] An object of the present invention is to reliably reduce uneven cleaning of the main surface of a glass plate.

[0012] Solutions to Solve Problems

[0013] (1) The glass plate cleaning device of the present invention, which is made to solve the above-mentioned problems, cleans the main surface of the glass plate, and is characterized in that the glass plate cleaning device comprises: a rotating cleaning body, which has a cleaning component in contact with the main surface of the glass plate and a rotating shaft connected to the cleaning component and rotating together with the cleaning component; and a support table, which supports the rotating shaft, and the support table has a sliding support structure that supports the rotating shaft so as to be movable in the axial direction. The glass plate cleaning device comprises a plurality of rotating cleaning bodies, and one support table has a plurality of sliding support structures that support the plurality of rotating shafts so as to be individually movable in their respective axial directions.

[0014] In this way, by using the sliding support structure to move (slide) the rotating shaft in the axial direction, the height position of the cleaning member relative to the main surface of the glass plate can be accurately adjusted. As a result, the contact state between the cleaning member and the main surface of the glass plate is stable, and the uneven cleaning of the main surface of the glass plate can be reliably reduced.

[0015] (2) In the configuration of (1) above, preferably, the glass plate cleaning device includes a plurality of rotating cleaning bodies, and one support table includes a plurality of sliding support structures that support the plurality of rotating shafts so as to be movable in their respective axial directions.

[0016] In this way, while a plurality of rotating shafts are supported by one support table, the height positions of the cleaning members connected to the rotating shafts can be individually adjusted by the respective sliding support structures.

[0017] (3) In the configuration of (1) or (2) above, it is preferred that the slide support structure is configured so that the rotation axis moves toward the main surface side under the self-weight of the rotary cleaning body.

[0018] In this way, the rotation axis is always kept close to the main surface of the glass plate, so that the contact state between the cleaning member and the main surface of the glass plate is more stable.

[0019] (4) In the configuration of (3) above, the rotary cleaning body preferably includes a detachable weight.

[0020] In this way, the force of the rotation axis toward the main surface side of the glass plate can be adjusted by the weight of the counterweight. Therefore, the contact state between the cleaning member and the main surface of the glass plate is more stable.

[0021] (5) In any one of the above structures (1) to (4), it is preferable that the sliding support structure includes a sliding bearing that supports the rotating shaft so as to be rotatable and movable in the axial direction.

[0022] In this way, the rotation of the rotating shaft can be stabilized while allowing the axial movement of the rotating shaft.

[0023] (6) The glass plate manufacturing method of the present invention, which is made to solve the above-mentioned problems, is characterized in that the glass plate manufacturing method includes a cleaning step of cleaning the main surface of the glass plate using a glass plate cleaning device having any one of the structures (1) to (5) above.

[0024] In this way, the same effects as those of the corresponding structures already described can be enjoyed.

[0025] Utility Model Effect

[0026] According to the present invention, the contact state between the cleaning member and the main surface of the glass plate is stabilized, so that the cleaning unevenness of the main surface of the glass plate can be reliably reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view which shows the glass plate cleaning device of 1st Embodiment.

[0028] Figure 2 It is shown Figure 1 A top view of a device for cleaning a glass plate.

[0029] Figure 3 Yes Figure 1 A cross-sectional view showing an enlarged periphery of a cleaning unit included in a glass plate cleaning device.

[0030] Figure 4 It is used to illustrate the use of Figure 1 A side view of a cleaning process of a glass plate cleaning device.

[0031] Figure 5 It is used to illustrate the use of Figure 1 A side view of a cleaning process of a glass plate cleaning device.

[0032] Figure 6 It is used to illustrate the use of Figure 1 A side view of a cleaning process of a glass plate cleaning device.

[0033] Figure 7 It is used to illustrate the use of Figure 1 A side view of a cleaning process of a glass plate cleaning device.

[0034] Figure 8 This is a cross-sectional view showing an enlarged view of the periphery of one cleaning unit included in the glass plate cleaning device according to the second embodiment. DETAILED DESCRIPTION

[0035] Hereinafter, the glass plate cleaning device and the glass plate manufacturing method of the present embodiment will be described with reference to the accompanying drawings. It should be noted that XYZ in the figure is an orthogonal coordinate system. The X direction and the Y direction are horizontal directions, and the Z direction is a vertical direction. By marking the corresponding components in each embodiment with the same figure mark, repeated descriptions are sometimes omitted. In the case where only a part of the structure is described in each embodiment, the structure of other embodiments previously described can be applied to the other parts of the structure. Not only the combination of structures explicitly stated in the description of each embodiment, but also the structures of multiple embodiments can be partially combined with each other even if not explicitly stated, as long as there is no particular obstacle to the combination.

[0036] (First Embodiment)

[0037] like Figure 1 as well as Figure 2 As shown, the glass plate cleaning device 1 of the first embodiment transports the glass plate G in a horizontal posture using a conveying mechanism (not shown) such as a roller conveyor or a belt conveyor, while simultaneously cleaning the upper surface Ga and the lower surface Gb of the glass plate G which are a pair of main surfaces opposing in the plate thickness direction.

[0038] Here, in this embodiment, the upper surface Ga of the glass plate G is set as a guaranteed surface, and the lower surface Gb of the glass plate G is set as a non-guaranteed surface. Circuits and the like are formed on the guaranteed surface in the manufacturing process of the display, etc. Therefore, the cleanliness of the upper surface Ga of the glass plate G, which is the guaranteed surface, becomes particularly important.

[0039] The size of one side of the glass plate G is preferably 500 mm to 4000 mm, and the plate thickness is preferably 0.05 mm to 10 mm, more preferably 0.2 mm to 0.7 mm.

[0040] The cleaning device 1 includes an upper surface cleaning mechanism 2 for cleaning an upper surface Ga of a glass plate G and a lower surface cleaning mechanism 3 for cleaning a lower surface Gb of the glass plate G.

[0041] Here, the lower surface cleaning mechanism 3 is a structure obtained by turning the upper surface cleaning mechanism 2 upside down, and has substantially the same structure as the upper surface cleaning mechanism 2. Therefore, the structure of the upper surface cleaning mechanism 2 will be described below as an example, and detailed description of the structure of the lower surface cleaning mechanism 3 will be omitted.

[0042] like Figure 1 As shown, the upper surface cleaning mechanism 2 includes: a support table 5 which forms a housing structure in which a cleaning liquid 4 is stored in an internal space; and a plurality of cleaning units 6 which clean the upper surface Ga of the glass plate G. As shown in FIG.

[0043] As the cleaning liquid 4, liquids such as cleaning liquid (for example, liquid detergent) and washing liquid (for example, water) can be used.

[0044] The support table 5 is arranged so as to span the width direction (X direction) of the glass plate G which is orthogonal to the conveying direction (Y direction) of the glass plate G. Both ends of the support table 5 in the width direction are supported by a lifting device 5a which supports the support table 5 so as to be able to be raised and lowered. In the present embodiment, when the glass plate G is cleaned, the support table 5 is fixedly placed at a predetermined reference position. On the other hand, when the thickness of the glass plate G is greatly changed due to a change in the type of the glass plate G, etc., before the glass plate G is cleaned, the height position of the support table 5 is adjusted by the lifting device 5a, and the reference position corresponding to the thickness of the glass plate G is set in advance.

[0045] A plurality of cleaning units 6 are arranged in a row along the width direction (X direction) of the glass plate G which is orthogonal to the conveying direction (Y direction) of the glass plate G. Each cleaning unit 6 includes: a shaft housing 7 fixed to the support platform 5 in a manner facing the internal space of the support platform 5; a rotating shaft 8 rotatably held on the shaft housing 7 in a manner facing the internal space of the shaft housing 7; and a cleaning member 9 mounted on the front end of the rotating shaft 8 on the outside of the support platform 5 and the shaft housing 7. In each cleaning unit 6, the rotating shaft 8 and the cleaning member 9 constitute a rotating cleaning body W, and rotate together as a whole. Here, the "front end" means the end on the glass plate G side, and the "base end" means the end on the side opposite to the front end on the glass plate G side (hereinafter, the same).

[0046] The shaft housing 7 is a cylindrical member, and is fixed in a state of being inserted into holes provided in the upper surface and the lower surface of the support stand 5 .

[0047] Sliding bearings 10 and 11 are press-fitted and fixed to the front end and base end of the shaft housing 7, respectively. The sliding bearing 10 on the front end side has a cylindrical portion 10a and a flange portion 10b provided at the front end of the cylindrical portion 10a. The sliding bearing 11 on the base end side has a cylindrical portion 11a and a flange portion 11b provided at the base end of the cylindrical portion 11a. The sliding bearings 10 and 11 may be made of metal, for example, but are made of resin (for example, engineering plastic) in this embodiment.

[0048] The rotating shaft 8 is held rotatable by the cylindrical portions 10a and 11a of the sliding bearings 10 and 11 in a state where the movement in the axial direction (L direction) is allowed. That is, the sliding bearings 10 and 11 and the shaft housing 7 constitute a sliding support structure S that supports the rotating shaft 8 to be movable in the axial direction. In the present embodiment, one support platform 5 has a plurality of sliding support structures S, and a plurality of rotating shafts 8 are supported to be movable in the axial direction. That is, a plurality of rotating cleaning bodies W can move in the axial direction.

[0049] The cleaning member 9 is detachable from the rotating shaft 8. The cleaning member 9 includes a cleaning portion 9a that comes into contact with the upper surface Ga of the glass plate G to clean the upper surface Ga of the glass plate G, and a support portion 9b that supports the cleaning portion 9a.

[0050] The type of the cleaning portion 9a may be, for example, a brush, but in this embodiment, it is a sponge. The shape of the cleaning portion 9a is not particularly limited, but in this embodiment, it is a disk shape.

[0051] The shaft housing 7 is provided with a first supply path R1 that connects the internal space of the support table 5 with the internal space of the shaft housing 7 . The cleaning liquid 4 in the internal space of the support table 5 is supplied to the internal space of the shaft housing 7 through the first supply path R1 as indicated by arrow a.

[0052] The rotating shaft 8 is provided with a second supply path R2 that connects the internal space of the shaft housing 7 and the cleaning member 9 . The cleaning liquid 4 in the internal space of the shaft housing 7 is supplied to the cleaning member 9 through the second supply path R2 as indicated by arrow b.

[0053] The cleaning member 9 is provided with a through hole R3 communicating with the second supply path R2, and the cleaning liquid 4 supplied from the second supply path R2 passes through the through hole R3 as indicated by arrow c and is supplied to the glass plate G. The through hole R3 may be omitted when the cleaning member 9 is formed of a material (e.g., a porous body) through which the cleaning liquid 4 can pass.

[0054] The upper surface cleaning mechanism 2 includes a rotation drive mechanism 12 that rotationally drives the rotation shaft 8 of each cleaning unit 6. The rotation drive mechanism 12 applies a rotation drive force to the base end of the rotation shaft 8 outside the support 5 and the shaft housing 7.

[0055] The rotation drive mechanism 12 includes a gear mechanism 13 and a drive unit 14. The gear mechanism 13 includes a plurality of gears 13a mounted on the base end of each rotating shaft 8, and adjacent gears 13a mesh with each other. The drive unit 14 includes a motor 14a and a gear 14b mounted on the motor 14a, and the gear 14b meshes with the gear 13a of the gear mechanism 13. Therefore, when the gear 14b rotates due to the rotation of the motor 14a, its power is transmitted to the gear mechanism 13, and the rotating shaft 8 of each cleaning unit 6 rotates.

[0056] In this embodiment, the rotation shafts 8 adjacent to each other in the width direction rotate in opposite directions (see Figure 2 ), but they may rotate in the same direction. The power transmission unit is not limited to the gear mechanism 13, and may be other mechanisms such as a belt. A drive unit (motor) may also be installed separately on each rotating shaft 8.

[0057] In addition, the lower surface cleaning mechanism 3 has a cleaning unit 15, a cleaning member 16, a cleaning portion 16a, a supporting portion 16b, etc., similar to the upper surface cleaning mechanism 2. The cleaning device 1 uses a pair of cleaning members 9 and 16 to clamp the upper and lower surfaces Ga and Gb of the glass plate G to clean. However, in this embodiment, the cleaning member 9 of the upper surface cleaning mechanism 2 moves in the up-down direction in a manner of following the upper surface Ga of the glass plate G, but the cleaning member 16 of the lower surface cleaning mechanism 3 does not move in the up-down direction in a manner of following the lower surface Gb of the glass plate G. That is, the cleaning member 16 of the lower surface cleaning mechanism 3 also maintains a constant height position during cleaning.

[0058] like Figure 2 As shown, the upper surface cleaning mechanism 2 has a plurality of rows (two rows in the example shown) of cleaning columns L1 and L2 obtained by arranging a plurality of cleaning units 6 in a row along the X direction at intervals along the conveying direction (Y direction). The cleaning components 9 included in the cleaning column L1 on the upstream side and the cleaning components 9 included in the cleaning column L2 on the downstream side are respectively arranged in a manner that does not completely overlap when observed from the conveying direction. As a result, when observed from the conveying direction, the cleaning components 9 of the cleaning column L2 on the downstream side are arranged in a manner that overlaps with the gaps between the cleaning components 9 adjacent in the width direction in the cleaning column L1 on the upstream side.

[0059] The support table 5 may be a separate support table for each of the cleaning rows L1 and L2, or a common (one) support table may be used for the plurality of cleaning rows L1 and L2.

[0060] like Figure 3 As shown, in the upper surface cleaning mechanism 2, the sliding support structure S is configured so that the rotating shaft 8 moves toward the upper surface Ga side of the glass plate G under the action of the deadweight of the rotating cleaning body W (rotating shaft 8 and cleaning member 9). That is, the downward protrusion amount D1 of the front end portion of the rotating shaft 8 from the support platform 5 in the state where the glass plate G does not exist is greater than the downward protrusion amount D2 of the front end portion of the rotating shaft 8 from the support platform 5 in the state where the glass plate G exists. In other words, the upward protrusion amount U1 of the base end portion of the rotating shaft 8 from the support platform 5 in the state where the glass plate G does not exist is smaller than the upward protrusion amount U2 of the base end portion of the rotating shaft 8 from the support platform 5 in the state where the glass plate G exists.

[0061] In the present embodiment, in the absence of the glass plate G, the cleaning member 9 of the upper surface cleaning mechanism 2 is placed on the cleaning member 16 of the lower surface cleaning mechanism 3 as the rotating shaft 8 is lowered by the deadweight of the rotating cleaning body W. It should be noted that, when the rotational driving force is transmitted by the gear mechanism 13, in order to maintain the meshing of the gears 13a, it is preferred that the maximum movement amount of the rotating shaft 8 (the lower protrusion amount D1-the lower protrusion amount D2) is set to be smaller than the thickness (tooth width) of the gear 13a. The maximum movement amount of the rotating shaft 8 can be managed, for example, by the size of the gap between the lower surface of the gear 13a and the upper surface of the shaft housing 7 (sliding bearing 11) in the up and down direction (Z direction). The maximum movement amount of the rotating shaft 8 is set to 0.1 to 10 mm, for example.

[0062] In this embodiment, inclined guide surfaces 9aa and 16aa are provided at the peripheral portions of the cleaning portions 9a and 16a of the two cleaning members 9 and 16 to guide the glass sheet G between the two cleaning members 9 and 16. Thus, the glass sheet G can easily enter between the two cleaning members 9 and 16 during the cleaning process.

[0063] Next, the manufacturing method of the glass plate of this embodiment is demonstrated.

[0064] The manufacturing method includes, for example, a forming step, an annealing step, a plate removing step, a cutting step, a cleaning step, an inspection step, and a packaging step.

[0065] In the forming step, a glass ribbon is formed from the molten glass by a known method such as an overflow down-draw method and a float method.

[0066] In the annealing step, the formed glass ribbon is annealed in order to reduce the warpage and internal strain of the formed glass ribbon.

[0067] In the plate-removing step, the annealed glass ribbon is cut into pieces of predetermined length to obtain a plurality of raw glass plates.

[0068] In the cutting step, the original glass sheet is cut into a predetermined size to obtain one or more glass sheets G. As a method for cutting the original glass sheet, for example, bending stress cutting, laser cutting, laser melting, etc. can be used. The glass sheet G is preferably rectangular.

[0069] In the cleaning step, the glass plate G is cleaned while being conveyed in a horizontal posture using the above-mentioned cleaning apparatus 1 .

[0070] In the inspection process, the cleaned glass plate G is inspected to see if there are any scratches, dust, dirt, etc. on the surface and / or if there are no internal defects such as bubbles and foreign matter. The inspection is performed using an optical inspection device such as a camera.

[0071] In the packing process, the glass plates G that meet the desired quality as a result of the inspection are packed. Packing is performed by stacking a plurality of glass plates G horizontally or vertically on a predetermined pallet. In this case, it is preferred that a protective sheet made of a backing paper, a foamed resin, or the like is interposed between the glass plates G in the stacking direction.

[0072] It should be noted that the manufacturing method may further include a heat treatment step after the plate taking step, and an end surface processing step after the cutting step.

[0073] Next, the operation of the cleaning device 1 in the above-mentioned cleaning step will be described.

[0074] In the cleaning process, first, Figure 4 As shown, the glass plate G is conveyed along the conveying direction (Y direction) from the upstream side of the cleaning device 1. At this time, the cleaning member 9 of the upper surface cleaning mechanism 2 is placed on the cleaning member 16 of the lower surface cleaning mechanism 3 in a standby state with the rotation shaft 8 being lowered by the dead weight of the rotating cleaning body W. That is, in the standby state, the two cleaning members 9 and 16 are in contact with each other.

[0075] Afterwards, when the glass plate G reaches the two cleaning components 9 and 16, Figure 5 as well as Figure 6 As shown in the figure, the glass plate G is inserted between the two cleaning members 9 and 16 so as to push the two cleaning members 9 and 16 apart.

[0076] Specifically, the cleaning member 9 of the upper surface cleaning mechanism 2 can move along the axial direction (up and down direction) of the rotating shaft 8 together with the rotating shaft 8 through the sliding support structure S. Therefore, when the glass plate G reaches the two cleaning members 9 and 16, the cleaning member 9 of the upper surface cleaning mechanism 2 is pushed upward by the glass plate G contacting the inclined guide surface 9aa (see Figure 5 ). Thus, the cleaning member 9 of the upper surface cleaning mechanism 2 climbs onto the upper surface Ga of the glass plate G while moving upward together with the rotating shaft 8. After climbing onto the upper surface, the cleaning member 9 of the upper surface cleaning mechanism 2 continuously presses the upper surface Ga of the glass plate G downward by the descent of the rotating shaft 8 due to the deadweight of the cleaning rotating part W (refer to Figure 6 ).

[0077] Furthermore, when the glass plate G is withdrawn from between the two cleaning members 9 and 16, Figure 7 As shown, the cleaning member 9 of the upper surface cleaning mechanism 2 is placed again on the cleaning member 16 of the lower surface cleaning mechanism 3 as the rotary shaft 8 is lowered by the weight of the cleaning rotary part W.

[0078] As described above, the rotating shaft 8 (cleaning rotating part W) of the upper surface cleaning mechanism 2 can be moved in the up-down direction by the sliding support structure S. Therefore, the cleaning member 9 of the upper surface cleaning mechanism 2 automatically adjusts the height position in a manner of following the upper surface Ga of the glass plate G. This action occurs in the same manner in each cleaning member 9 included in the upper surface cleaning mechanism 2. Therefore, the contact state between each cleaning member 9 and the upper surface Ga of the glass plate G is stable, and the uneven cleaning of the upper surface Ga of the glass plate G can be reliably reduced.

[0079] (Second Embodiment)

[0080] like Figure 8 As shown, the glass plate cleaning device 1 and the glass plate cleaning method of the second embodiment are different from those of the first embodiment in that a detachable weight 21 is provided on the rotating cleaning body W of the upper surface cleaning mechanism 2 .

[0081] Specifically, the weight 21 is placed on the support portion 9b of the cleaning member 9 and is detachably fixed to the support portion 9b by a fastening member such as a bolt.

[0082] The shape of the weight 21 is not particularly limited, but in the present embodiment, it is an annular shape along the peripheral edge of the disk-shaped cleaning portion 9a in a plan view. In addition, the weight 21 is divided into a plurality of parts (eg, two halves) in the circumferential direction in consideration of mounting performance.

[0083] By providing the counterweight 21 in this way, the magnitude of the deadweight of the rotating cleaning body W acting on the rotating shaft 8 can be adjusted. That is, the force of the rotating shaft 8 toward the upper surface Ga of the glass plate G can be adjusted. Therefore, there is an advantage that the contact state between the cleaning member 9 and the upper surface Ga of the glass plate G is very stable.

[0084] It should be noted that the counterweight 21 is preferably a stacked structure in which a plurality of plate-like bodies are stacked. In this way, the weight of the counterweight 21 can be easily adjusted by the number of stacked plate-like bodies.

[0085] The weight 21 may be detachably provided on the rotating shaft 8. The mounting position of the weight 21 is not particularly limited as long as it is within the range of the rotating cleaning body W.

[0086] The present invention is not limited to the configuration of the above-described embodiment, nor is it limited to the above-described effects. The present invention can be modified in various ways without departing from the gist of the present invention.

[0087] In the above-mentioned embodiment, the structure in which the cleaning liquid stored in the internal space of the support table is supplied to the glass plate via the rotating shaft and the cleaning member is described, but the method of supplying the cleaning liquid is not limited to this. For example, the cleaning liquid may be supplied to the glass plate by spraying it with a spray nozzle or the like. In other words, if the support table has a sliding support structure that supports the rotating shaft, it is not necessary to have a structure for storing the cleaning liquid.

[0088] In the above-mentioned embodiment, the case where the cleaning components of the upper surface cleaning mechanism and the cleaning components of the lower surface cleaning mechanism are in contact with each other in the standby state without the glass plate is described, but it is not limited to this. For example, it is also possible that a gap smaller than the thickness of the glass plate is formed between the cleaning components of the upper surface cleaning mechanism and the cleaning components of the lower surface cleaning mechanism in the standby state without the glass plate. That is, it is also possible that the cleaning components of the upper surface cleaning mechanism and the cleaning components of the lower surface cleaning mechanism do not contact each other in the standby state without the glass plate. In this case, the rotating shaft of the upper surface cleaning mechanism preferably has an anti-slip portion that engages with the sliding support structure (such as the shaft housing) at the position (lower dead center) protruding to the lowest point.

[0089] In the above-mentioned embodiment, a case where a plurality of rotating shafts are supported by one supporting platform has been described. However, a dedicated supporting platform may be provided for each rotating shaft.

[0090] In the above-mentioned embodiment, the case where the glass plate is moved relative to the cleaning member arranged at a fixed position is described, but as long as there is relative movement between the cleaning member and the glass plate, any method of moving either one of them is acceptable. That is, the cleaning member may be moved relative to the glass plate arranged at a fixed position, or both the glass plate and the cleaning member may be moved.

[0091] In the above-mentioned embodiment, the case where the upper and lower surfaces of the glass plate are cleaned simultaneously is described, but only the upper surface of the glass plate may be cleaned.

[0092] In the above-mentioned embodiment, when the glass plate is being cleaned and conveyed, the glass plate may be tilted in a width direction perpendicular to the conveying direction so that one end side is located at a lower position than the other end side. In this way, excess liquid adhering to the upper surface of the glass plate flows down from the upper surface of the glass plate due to its own weight, and it is possible to prevent the accumulation of liquid on the upper surface of the glass plate that causes dirt.

[0093] Description of Reference Numerals

[0094] 1 Cleaning device

[0095] 2 Upper surface cleaning mechanism

[0096] 3. Lower surface cleaning mechanism

[0097] 4 Cleaning fluid

[0098] 5 Support platform

[0099] 6. Cleaning unit

[0100] 7 Axle housing

[0101] 8 Rotation axes

[0102] 9. Cleaning components

[0103] 10 Sliding bearings

[0104] 11 Sliding bearings

[0105] 12 Rotation drive mechanism

[0106] 16. Cleaning components

[0107] 21 Counterweight

[0108] G Glass Plate

[0109] W Rotating cleaning body

[0110] S Sliding bearing structure.

Claims

1. A glass plate cleaning device for cleaning a main surface of a glass plate, It is characterized in that The glass plate cleaning device comprises: a rotating cleaning body having a cleaning member in contact with the main surface of the glass plate and a rotating shaft connected to the cleaning member and rotating together with the cleaning member; as well as a support table that supports the rotating shaft, The support table includes a sliding support structure that supports the rotating shaft so as to be movable in the axial direction. The glass plate cleaning device comprises a plurality of the rotating cleaning bodies. One of the support tables includes a plurality of the slide support structures that support the plurality of rotating shafts so as to be independently movable in the respective axial directions.

2. The glass plate cleaning device according to claim 1, characterized in that: The slide support structure is configured so that the rotation shaft moves toward the main surface side of the glass plate under the self-weight of the rotary cleaning body.

3. The glass plate cleaning device according to claim 2, characterized in that: The rotary cleaning body is provided with a detachable counterweight.

4. The glass plate cleaning device according to any one of claims 1 to 3, characterized in that: The sliding support structure includes a sliding bearing that supports the rotating shaft so as to be rotatable and movable in the axial direction.

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